Power Management of a Grid Interactive PV - Fuel Cell Hybrid System with Power Dispatch to the Grid Using Modified LMS Control

摘要

Hybrid systems comprising renewable energy sources based distributed energy generation connected to the grid with energy storage systems increase the cost and control complexity. But, to provide reliable power to the grid, storage systems are essential. Here, a grid-connected Photovoltaic-Fuel cell hybrid system with a fixed power dispatch to the grid using a modified least mean square control has been proposed. This has been realized to control the power flow from the sources and the load. Any variation in the photovoltaic power is balanced by power from the fuel cell by introducing a power management scheme. The change in power flow to the load arising at the transient stage due to the slow response of the fuel cell is met by power support from the grid. Moreover, the hybrid system mitigates power quality issues at the point of interconnection in the grid. The performances of the system during steady-state and transient conditions are verified by extensive simulation analysis with MATLAB with its simpower system block set.